CN108380688A - Splined shaft cold extrusion processing mold and processing method - Google Patents

Splined shaft cold extrusion processing mold and processing method Download PDF

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Publication number
CN108380688A
CN108380688A CN201810130048.2A CN201810130048A CN108380688A CN 108380688 A CN108380688 A CN 108380688A CN 201810130048 A CN201810130048 A CN 201810130048A CN 108380688 A CN108380688 A CN 108380688A
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CN
China
Prior art keywords
cavity
die
diameter
combination
retainer plate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810130048.2A
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Chinese (zh)
Inventor
顾成义
沈华宾
樊博闻
饶广
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU HAIYU MACHINERY CO Ltd
Original Assignee
JIANGSU HAIYU MACHINERY CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU HAIYU MACHINERY CO Ltd filed Critical JIANGSU HAIYU MACHINERY CO Ltd
Priority to CN201810130048.2A priority Critical patent/CN108380688A/en
Publication of CN108380688A publication Critical patent/CN108380688A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00Profiling tools for metal extruding
    • B21C25/02Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts
    • B21K1/066Making machine elements axles or shafts splined

Abstract

Splined shaft cold extrusion processing mold provided by the invention includes Upper shaft sleeve and lower axle bed, Upper shaft sleeve is located above lower axle bed, Upper shaft sleeve includes top, middle part and lower part, the outer diameter of the upper and lower part of Upper shaft sleeve is respectively less than the outer diameter in the middle part of it, the top periphery of Upper shaft sleeve is provided with upper mold retainer plate, upper cavity is disposed in Upper shaft sleeve from top to bottom, one combination upper cavity die and three combination lower cavity dies, upper cavity, the cavity of the cavity and combination lower cavity die that combine upper cavity die is coaxial, upper cavity, forming recess is collectively formed in the cavity for combining upper cavity die and the cavity for combining lower cavity die;It is provided with center cavity in lower axle bed, lower die retainer plate is provided with around lower axle bed, a part for the lower part of Upper shaft sleeve is located in lower die retainer plate, is attached by connector between upper mold retainer plate and lower die retainer plate.Splined shaft cold extruding processing method provided by the invention includes blanking, ball blast, face coat, heating, forging, normalizing, ball blast, phospholeum and cold extrusion shaped.

Description

Splined shaft cold extrusion processing mold and processing method
Technical field
The present invention relates to cold and hot technical field of forging, more particularly to a kind of splined shaft cold extrusion processing mold and processing side Method.
Background technology
Splined shaft is common transmission parts, and profile accuracy and intensity are to determine the whether reliable smoothly important ginseng of transmission Number.The prior art mostly uses machining gear rolling, gear hobbing or the method processing of cold extrusion tooth form and prepares splined shaft.For diameter compared with Splined shaft small, deformation ratio is larger, tooth form is relatively high, machine-cut tooth are easily deformed, and precision is not high;Traditional cold extrusion work Skill can be because of ejecting force under unit because effectively ejection diameter and lower push rod liftout section diameter are too small after tooth forming Carry and reduce quality and the service life of splined shaft, and the problems such as there are of high cost, low production efficiencies.
Invention content
In view of the above technical problems, an object of the present invention is to provide a kind of splined shaft cold extrusion processing molds, separately One purpose is to propose a kind of splined shaft cold extruding processing method.
Splined shaft cold extrusion processing mold according to a first aspect of the present invention, including Upper shaft sleeve and lower axle bed, Upper shaft sleeve position Above lower axle bed, Upper shaft sleeve includes upper, middle and lower, and the outer diameter of the upper and lower part of Upper shaft sleeve is respectively less than in the middle part of it The top periphery of outer diameter, Upper shaft sleeve is provided with upper mold retainer plate, and the internal diameter of upper mold retainer plate is equal to the outer diameter on the top of Upper shaft sleeve, The outer diameter of upper mold retainer plate is more than the outer diameter at the middle part of Upper shaft sleeve, be disposed with from top to bottom in Upper shaft sleeve upper cavity, one Upper cavity die and at least three combination lower cavity dies are combined, the cavity of this combination upper cavity die and each cavity of combination lower cavity die are successively It penetrates through and coaxial, the cavity of the cavity and combination lower cavity die of upper cavity and combination upper cavity die is coaxial, and combination upper cavity die includes first Upper cavity die and the second upper cavity die, to be uniformly distributed on circumference, there are six identical concave arcs in the section of the forming surface of the second upper cavity die Circle, combination lower cavity die include the first lower cavity die and the second lower cavity die, and upper cavity combines the cavity of upper cavity die and combines lower cavity die Forming recess is collectively formed in cavity;It is provided with center cavity in lower axle bed, center cavity is coaxial with upper cavity, is provided with around lower axle bed A part for lower die retainer plate, the lower part of Upper shaft sleeve is located in lower die retainer plate, and the internal diameter of lower die retainer plate is equal to Upper shaft sleeve The outer diameter of lower part, the maximum outside diameter of lower die retainer plate are equal to the outer diameter of upper mold retainer plate, upper mold retainer plate and lower die retainer plate it Between be attached by connector.
Preferably, Upper shaft sleeve and lower axle bed are axially symmetric structure.
Preferably, vertically there is the first interval between the first upper cavity die and the second upper cavity die, the first upper cavity die There are the first angles with vertical direction for forming surface.Further, 2.5 millimeters are divided between first, the first angle is 18-22 degree.
Preferably, between the first lower cavity die and the second lower cavity die vertically exist second interval, the first lower cavity die and There are the second angles between the forming surface of second lower cavity die.Further, 5 millimeters are divided between second, the second angle is 170 degree.
Preferably, the outer diameter of combination upper cavity die and at least three combination lower cavity dies is all equal, and it is all more than the upper mold The internal diameter of chamber.
Preferably, the internal diameter of center cavity is less than the maximum inner diameter of the cavity of each combination lower cavity die.Further, center cavity Internal diameter be less than upper cavity internal diameter.
Splined shaft cold extruding processing method according to a further aspect of the invention, includes the following steps:
(1)Bar raw material is sawn into blank to be processed by blanking;
(2)Ball blast mixes appropriate water chestnut sand in the shot of shot-blasting machine, and blank surface feather plucking is formed pit;
(3)Proportioned graphite liquid is warmed to 150 DEG C -300 DEG C by face coat, will be placed in one leaching by the blank of ball blast Several minutes of bubble, dries;
(4)Heating, the blank heating that coating is completed is to 750-950 DEG C;
(5)Blank after heating just squeeze by forging;
(6)Blank is packed into normalizing furnace by normalizing, is warming up to 820-850 DEG C, keeps the temperature 2 hours, rapid air-cooled after coming out of the stove;
(7)Ball blast is added the shot of 0.6mm in shot-blasting machine, blank inner and outer surfaces oxide skin is removed;
(8)Blank after ball blast is carried out phospholeum surface treatment, phosphatization 10-20 minutes, saponification 15-25 minutes by phospholeum;
(9)It is cold extrusion shaped, by the blank made be put into the splined shaft cold extrusion processing mold described in any one as above into Row extrusion forming.
Compared with prior art, splined shaft cold extrusion processing mold of the invention is set by combining the first angle of upper cavity die It counts, be uniformly distributed on the circumference of the second upper cavity die there are six the design of the round forming surface section of identical concave arc and combine lower cavity die The second angle design so that spline is hardly damaged in ejection process, and depanning is more prone to, meanwhile, the splined shaft cold-extruded Press processing mold formed precision high, stock utilization is high, and the production efficiency of part is greatly improved.The splined shaft of the present invention is cold Extruding method it is cold extrusion shaped it is preceding by blanking, ball blast, face coat, heating, forging, normalizing, ball blast, phospholeum at Reason substantially increases the strength and stability of blank, and carrying out cold-extruded using the splined shaft cold extrusion processing mold of the present invention is pressed into Type handles formed precision height, reliable and stable.
Description of the drawings
Fig. 1 is splined shaft cold extrusion processing mold scheme of erection of the present invention.
Fig. 2A is that splined shaft cold extrusion processing mold of the present invention combines upper cavity die schematic diagram.
Fig. 2 B are the schematic cross-section of the forming surface of second upper cavity die of splined shaft cold extrusion processing mold of the present invention.
Fig. 3 is that splined shaft cold extrusion processing mold of the present invention combines lower cavity die schematic diagram.
Fig. 4 A, Fig. 4 B are splined shaft cold extrusion blank figure of the present invention.
Fig. 5 is splined shaft cold extruding processing method flow chart of the present invention.
Fig. 6 is respectively the blank schematic diagram after blanking, forging and cold extrusion from left to right.
Specific implementation mode
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby coordinate embodiment detailed It is described as follows.
Fig. 1, Fig. 2A, Fig. 2 B and Fig. 3 are referred to, splined shaft cold extrusion processing mold according to a first aspect of the present invention, packet Upper shaft sleeve 1 and lower axle bed 2 are included, Upper shaft sleeve 1 is located at 2 top of lower axle bed, and Upper shaft sleeve 1 includes top 11, middle part 12 and lower part 13, on The top 11 of axle sleeve 1 and the outer diameter of lower part 13 are respectively less than the outer diameter at its middle part 12, and upper mold is provided with around the top 11 of Upper shaft sleeve 1 Retainer plate 5, the internal diameter of upper mold retainer plate 5 are equal to the outer diameter on the top 11 of Upper shaft sleeve 1, and the outer diameter of upper mold retainer plate 5 is more than upper axis The outer diameter at 1 middle part 12 is covered, is disposed with 9, combination upper cavity dies 3 and at least three of upper cavity in Upper shaft sleeve 1 from top to bottom The cavity of a combination lower cavity die 4, the cavity of this combination upper cavity die 3 and each combination lower cavity die 4 penetrates through successively and coaxial, upper mold Chamber 9 and combine the cavity of upper cavity die 3 and combine lower cavity die 4 cavity it is coaxial, combination upper cavity die 3 includes the first upper cavity die 31 and the The section of two upper cavity dies 32, the forming surface of the second upper cavity die 32 is the circle being uniformly distributed on circumference there are six identical concave arc 321, group It includes the first lower cavity die 41 and the second lower cavity die 42, upper cavity 9, the cavity for combining upper cavity die 3 and combination lower cavity die to close lower cavity die 4 Forming recess 8 is collectively formed in 4 cavity;Center cavity 21 is provided in lower axle bed 2, center cavity 21 is coaxial with upper cavity 9, lower axle bed Lower die retainer plate 6 is provided with around 2, a part for the lower part 13 of Upper shaft sleeve 1 is located in lower die retainer plate 6, lower die retainer plate 6 Internal diameter is equal to the outer diameter of the lower part 13 of Upper shaft sleeve 1, and the maximum outside diameter of lower die retainer plate 6 is equal to the outer diameter of upper mold retainer plate 5, upper mold It is attached by connector 7 between retainer plate 5 and lower die retainer plate 6.In one embodiment of the invention, 1 He of Upper shaft sleeve Lower axle bed 2 is axially symmetric structure.In practical applications, a combination upper cavity die 3 and at least three combines the outer diameter of lower cavity die 4 It is all equal, and all it is more than the internal diameter of upper cavity 9.Preferably, the internal diameter of center cavity 21 is less than the cavity of each combination lower cavity die 4 Maximum inner diameter.Further, the internal diameter of center cavity 21 is less than the internal diameter of upper cavity 9.
Vertically there is the first interval d1 between first upper cavity die 31 and the second upper cavity die 32, the first upper cavity die 31 There are the first angle αs with vertical direction for forming surface.Further, the first interval d1 is 2.5 millimeters, and the first angle α is 18-22 Degree.
Vertically there is the second interval d2,41 He of the first lower cavity die between first lower cavity die 41 and the second lower cavity die 42 There are the second angle β between the forming surface of second lower cavity die 42.Further, the second interval d2 is 5 millimeters, and the second angle β is 170 degree.
The course of work:Suitable blank is insert molded in cavity 8 first, the forcing press of adapted drives hold-down devices downward Movement gives blank active force as forging hammer, makes blank forging forming in forming recess 8, obtains the shape of needs.It is forging and pressing Bi Hou, the ejection out of forming recess 8 by blank 100 upwards of center cavity 21 that liftout attachment passes through lower axle bed 2.The blank 100 It is the schematic elevation view of splined shaft cold extrusion blank of the present invention referring to Fig. 4 A and 4B, wherein Fig. 4 A, Fig. 4 B are splined shaft of the present invention The schematic side view of cold extrusion blank.
Fig. 5 and Fig. 6 is referred to, splined shaft cold extruding processing method according to a further aspect of the invention includes the following steps:
(1)Bar raw material is sawn into blank 61 to be processed by blanking;
(2)Ball blast mixes appropriate water chestnut sand in the shot of shot-blasting machine, and blank 61 to be processed surface roughening is formed pit;
(3)Proportioned graphite liquid is warmed to 150 DEG C -300 DEG C by face coat, will be placed in one leaching by the blank of ball blast Several minutes of bubble, dries;
(4)Heating, the blank heating that coating is completed is to 750-950 DEG C;
(5)Blank after heating just squeeze, obtains extrusion billet 62 by forging;
(6)Extrusion billet 62 is packed into normalizing furnace, is warming up to 820-850 DEG C, keeps the temperature 2 hours by normalizing, rapid air-cooled after coming out of the stove;
(7)Ball blast is added the shot of 0.6mm in shot-blasting machine, the blank inner and outer surfaces oxide skin after normalizing is removed;
(8)Blank after ball blast is carried out phospholeum surface treatment, phosphatization 10-20 minutes by phospholeum, and saponification 15-25 minutes obtains To the blank made;
(9)It is cold extrusion shaped, the blank made is put into the splined shaft cold extrusion processing mold described in any one embodiment as above Middle carry out extrusion forming obtains final piece 63.
The splined shaft cold extrusion processing mold of the present invention is by combining the design of the first angle, second upper cavity die of upper cavity die The second angle design there are six the design of the round forming surface section of identical concave arc and combination lower cavity die is uniformly distributed on circumference, So that spline is hardly damaged in ejection process, and depanning is more prone to, meanwhile, splined shaft cold extrusion processing mold molding essence Degree is high, and stock utilization is high, and the production efficiency of part is greatly improved.
The present invention splined shaft cold extruding processing method it is cold extrusion shaped it is preceding by blanking, ball blast, face coat, plus Heat, forging, normalizing, ball blast, phosphorus saponification process substantially increase the strength and stability of blank, using the splined shaft of the present invention Cold extrusion processing mold carries out cold extrusion shaped processing formed precision height, reliable and stable.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only the example for implementing the present invention. It must be noted that the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from the present invention spirit and It is changed and retouched made by range, belongs to the scope of patent protection of the present invention.

Claims (10)

1. a kind of splined shaft cold extrusion processing mold, including Upper shaft sleeve and lower axle bed, it is characterised in that the Upper shaft sleeve is located at institute It states above lower axle bed, the Upper shaft sleeve includes upper, middle and lower, and the outer diameter of the upper and lower part of the Upper shaft sleeve is respectively less than The top periphery of outer diameter in the middle part of it, the Upper shaft sleeve is provided with upper mold retainer plate, and the internal diameter of the upper mold retainer plate is equal to institute The outer diameter on the top of Upper shaft sleeve is stated, the outer diameter of the upper mold retainer plate is more than the outer diameter at the middle part of the Upper shaft sleeve, the upper axis Upper cavity, a combination upper cavity die and at least three combination lower cavity dies, the combination fovea superior are disposed in set from top to bottom The cavity of the cavity of mould and each combination lower cavity die penetrates through successively and coaxial, the cavity of the upper cavity and the combination upper cavity die And the cavity of combination lower cavity die is coaxial, the combination upper cavity die includes the first upper cavity die and the second upper cavity die, second fovea superior The section of the forming surface of mould is the circle being uniformly distributed on circumference there are six identical concave arc, and the combination lower cavity die includes first recessed Forming recess is collectively formed in the cavity of mould and the second lower cavity die, the upper cavity, the cavity for combining upper cavity die and combination lower cavity die; Center cavity is provided in the lower axle bed, the center cavity is coaxial with the upper cavity, and lower die is provided with around the lower axle bed A part for retainer plate, the lower part of the Upper shaft sleeve is located in the lower die retainer plate, and the internal diameter of the lower die retainer plate is equal to The outer diameter of the lower part of the Upper shaft sleeve, the maximum outside diameter of the lower die retainer plate is equal to the outer diameter of the upper mold retainer plate, described It is attached by connector between upper mold retainer plate and the lower die retainer plate.
2. splined shaft cold extrusion processing mold as described in claim 1, it is characterised in that the Upper shaft sleeve and the lower axle bed It is axially symmetric structure.
3. splined shaft cold extrusion processing mold as described in claim 1, it is characterised in that first upper cavity die and described Vertically there is the first interval between two upper cavity dies, there are the first folders with vertical direction for the forming surface of first upper cavity die Angle.
4. splined shaft cold extrusion processing mold as claimed in claim 3, it is characterised in that 2.5 millimeters are divided between described first, First angle is 18-22 degree.
5. splined shaft cold extrusion processing mold as described in claim 1, it is characterised in that first lower cavity die and described Vertically there is the second interval between two lower cavity dies, between first lower cavity die and the forming surface of second lower cavity die There are the second angles.
6. splined shaft cold extrusion processing mold as claimed in claim 5, it is characterised in that be divided into 5 millimeters between described second, institute It is 170 degree to state the second angle.
7. splined shaft cold extrusion processing mold as described in claim 1, it is characterised in that the combination upper cavity die and at least three The outer diameter of a combination lower cavity die is all equal, and it is all more than the internal diameter of the upper cavity.
8. splined shaft cold extrusion processing mold as described in claim 1, it is characterised in that the internal diameter of the center cavity is less than every The maximum inner diameter of the cavity of a combination lower cavity die.
9. splined shaft cold extrusion processing mold as claimed in claim 8, it is characterised in that the internal diameter of the center cavity is less than institute State the internal diameter of upper cavity.
10. a kind of splined shaft cold extruding processing method, it is characterised in that include the following steps:
(1)Bar raw material is sawn into blank to be processed by blanking;
(2)Ball blast mixes appropriate water chestnut sand in the shot of shot-blasting machine, and blank surface feather plucking is formed pit;
(3)Proportioned graphite liquid is warmed to 150 DEG C -300 DEG C by face coat, will be placed in one leaching by the blank of ball blast Several minutes of bubble, dries;
(4)Heating, the blank heating that coating is completed is to 750-950 DEG C;
(5)Blank after heating just squeeze by forging;
(6)Blank is packed into normalizing furnace by normalizing, is warming up to 820-850 DEG C, keeps the temperature 2 hours, rapid air-cooled after coming out of the stove;
(7)Ball blast is added the shot of 0.6mm in shot-blasting machine, blank inner and outer surfaces oxide skin is removed;
(8)Blank after ball blast is carried out phospholeum surface treatment, phosphatization 10-20 minutes, saponification 15-25 minutes by phospholeum;
(9)It is cold extrusion shaped, the blank made is put into the splined shaft cold extrusion as described in any one of claim 1-9 and is added Extrusion forming is carried out in tool and mould.
CN201810130048.2A 2018-02-08 2018-02-08 Splined shaft cold extrusion processing mold and processing method Pending CN108380688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810130048.2A CN108380688A (en) 2018-02-08 2018-02-08 Splined shaft cold extrusion processing mold and processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810130048.2A CN108380688A (en) 2018-02-08 2018-02-08 Splined shaft cold extrusion processing mold and processing method

Publications (1)

Publication Number Publication Date
CN108380688A true CN108380688A (en) 2018-08-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810130048.2A Pending CN108380688A (en) 2018-02-08 2018-02-08 Splined shaft cold extrusion processing mold and processing method

Country Status (1)

Country Link
CN (1) CN108380688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109226650A (en) * 2018-11-20 2019-01-18 东莞市正品五金电子有限公司 A kind of molding die and its processing method of gear shaft cold extrusion processing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109226650A (en) * 2018-11-20 2019-01-18 东莞市正品五金电子有限公司 A kind of molding die and its processing method of gear shaft cold extrusion processing
CN109226650B (en) * 2018-11-20 2020-07-07 东莞市正品五金电子有限公司 Forming die for cold extrusion processing of gear shaft and processing method thereof

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